$$3\sqrt{ {72.9\over0.4096}}$$ is equal to : 

If (a + b):(b + c):(c + a) = 7:6:5 and a + b + c = 27, then what will be the value of 1/a: 1/b :1/c?

If 12x – 15 y =9x + 5y, the value of $$ {x^{2}+{y^{2}}\over{x^{2}-y^{2}}}$$ is

The smallest 4- digit number which is a perfect square is 

What is the value of $${0.74×1.23×0.13\over (0.37)^{3}+(0.41)^{3}-8(0.39)^{3}}$$ ?

What is the value of x $$ {0.081\over x}={0.09\over10}$$ ?

The value of $${\sqrt{40+\sqrt{9\sqrt{81}}} }$$ is

Direction : What value should come in the place of question mark (?) in the following questions?

125% of 2440 – 75% of 1856 = ?